/*! iScroll v5.2.0-snapshot ~ (c) 2008-2017 Matteo Spinelli ~ http://cubiq.org/license */
(function (window, document, Math) {
    var rAF = window.requestAnimationFrame	||
        window.webkitRequestAnimationFrame	||
        window.mozRequestAnimationFrame		||
        window.oRequestAnimationFrame		||
        window.msRequestAnimationFrame		||
        function (callback) { window.setTimeout(callback, 1000 / 60); };
    
    var utils = (function () {
        var me = {};
    
        var _elementStyle = document.createElement('div').style;
        var _vendor = (function () {
            var vendors = ['t', 'webkitT', 'MozT', 'msT', 'OT'],
                transform,
                i = 0,
                l = vendors.length;
    
            for ( ; i < l; i++ ) {
                transform = vendors[i] + 'ransform';
                if ( transform in _elementStyle ) return vendors[i].substr(0, vendors[i].length-1);
            }
    
            return false;
        })();
    
        function _prefixStyle (style) {
            if ( _vendor === false ) return false;
            if ( _vendor === '' ) return style;
            return _vendor + style.charAt(0).toUpperCase() + style.substr(1);
        }
    
        me.getTime = Date.now || function getTime () { return new Date().getTime(); };
    
        me.extend = function (target, obj) {
            for ( var i in obj ) {
                target[i] = obj[i];
            }
        };
    
        me.addEvent = function (el, type, fn, capture) {
            el.addEventListener(type, fn, !!capture);
        };
    
        me.removeEvent = function (el, type, fn, capture) {
            el.removeEventListener(type, fn, !!capture);
        };
    
        me.prefixPointerEvent = function (pointerEvent) {
            return window.MSPointerEvent ?
                'MSPointer' + pointerEvent.charAt(7).toUpperCase() + pointerEvent.substr(8):
                pointerEvent;
        };
    
        me.momentum = function (current, start, time, lowerMargin, wrapperSize, deceleration) {
            var distance = current - start,
                speed = Math.abs(distance) / time,
                destination,
                duration;
    
            deceleration = deceleration === undefined ? 0.0006 : deceleration;
    
            destination = current + ( speed * speed ) / ( 2 * deceleration ) * ( distance < 0 ? -1 : 1 );
            duration = speed / deceleration;
    
            if ( destination < lowerMargin ) {
                destination = wrapperSize ? lowerMargin - ( wrapperSize / 2.5 * ( speed / 8 ) ) : lowerMargin;
                distance = Math.abs(destination - current);
                duration = distance / speed;
            } else if ( destination > 0 ) {
                destination = wrapperSize ? wrapperSize / 2.5 * ( speed / 8 ) : 0;
                distance = Math.abs(current) + destination;
                duration = distance / speed;
            }
    
            return {
                destination: Math.round(destination),
                duration: duration
            };
        };
    
        var _transform = _prefixStyle('transform');
    
        me.extend(me, {
            hasTransform: _transform !== false,
            hasPerspective: _prefixStyle('perspective') in _elementStyle,
            hasTouch: 'ontouchstart' in window,
            hasPointer: !!(window.PointerEvent || window.MSPointerEvent), // IE10 is prefixed
            hasTransition: _prefixStyle('transition') in _elementStyle
        });
    
        /*
        This should find all Android browsers lower than build 535.19 (both stock browser and webview)
        - galaxy S2 is ok
        - 2.3.6 : `AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1`
        - 4.0.4 : `AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30`
       - galaxy S3 is badAndroid (stock brower, webview)
         `AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30`
       - galaxy S4 is badAndroid (stock brower, webview)
         `AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30`
       - galaxy S5 is OK
         `AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Mobile Safari/537.36 (Chrome/)`
       - galaxy S6 is OK
         `AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Mobile Safari/537.36 (Chrome/)`
      */
        me.isBadAndroid = (function() {
            var appVersion = window.navigator.appVersion;
            // Android browser is not a chrome browser.
            if (/Android/.test(appVersion) && !(/Chrome\/\d/.test(appVersion))) {
                var safariVersion = appVersion.match(/Safari\/(\d+.\d)/);
                if(safariVersion && typeof safariVersion === "object" && safariVersion.length >= 2) {
                    return parseFloat(safariVersion[1]) < 535.19;
                } else {
                    return true;
                }
            } else {
                return false;
            }
        })();
    
        me.extend(me.style = {}, {
            transform: _transform,
            transitionTimingFunction: _prefixStyle('transitionTimingFunction'),
            transitionDuration: _prefixStyle('transitionDuration'),
            transitionDelay: _prefixStyle('transitionDelay'),
            transformOrigin: _prefixStyle('transformOrigin'),
            touchAction: _prefixStyle('touchAction')
        });
    
        me.hasClass = function (e, c) {
            var re = new RegExp("(^|\\s)" + c + "(\\s|$)");
            return re.test(e.className);
        };
    
        me.addClass = function (e, c) {
            if ( me.hasClass(e, c) ) {
                return;
            }
    
            var newclass = e.className.split(' ');
            newclass.push(c);
            e.className = newclass.join(' ');
        };
    
        me.removeClass = function (e, c) {
            if ( !me.hasClass(e, c) ) {
                return;
            }
    
            var re = new RegExp("(^|\\s)" + c + "(\\s|$)", 'g');
            e.className = e.className.replace(re, ' ');
        };
    
        me.offset = function (el) {
            var left = -el.offsetLeft,
                top = -el.offsetTop;
    
            // jshint -W084
            while (el = el.offsetParent) {
                left -= el.offsetLeft;
                top -= el.offsetTop;
            }
            // jshint +W084
    
            return {
                left: left,
                top: top
            };
        };
    
        me.preventDefaultException = function (el, exceptions) {
            for ( var i in exceptions ) {
                if ( exceptions[i].test(el[i]) ) {
                    return true;
                }
            }
    
            return false;
        };
    
        me.extend(me.eventType = {}, {
            touchstart: 1,
            touchmove: 1,
            touchend: 1,
    
            mousedown: 2,
            mousemove: 2,
            mouseup: 2,
    
            pointerdown: 3,
            pointermove: 3,
            pointerup: 3,
    
            MSPointerDown: 3,
            MSPointerMove: 3,
            MSPointerUp: 3
        });
    
        me.extend(me.ease = {}, {
            quadratic: {
                style: 'cubic-bezier(0.25, 0.46, 0.45, 0.94)',
                fn: function (k) {
                    return k * ( 2 - k );
                }
            },
            circular: {
                style: 'cubic-bezier(0.1, 0.57, 0.1, 1)',	// Not properly "circular" but this looks better, it should be (0.075, 0.82, 0.165, 1)
                fn: function (k) {
                    return Math.sqrt( 1 - ( --k * k ) );
                }
            },
            back: {
                style: 'cubic-bezier(0.175, 0.885, 0.32, 1.275)',
                fn: function (k) {
                    var b = 4;
                    return ( k = k - 1 ) * k * ( ( b + 1 ) * k + b ) + 1;
                }
            },
            bounce: {
                style: '',
                fn: function (k) {
                    if ( ( k /= 1 ) < ( 1 / 2.75 ) ) {
                        return 7.5625 * k * k;
                    } else if ( k < ( 2 / 2.75 ) ) {
                        return 7.5625 * ( k -= ( 1.5 / 2.75 ) ) * k + 0.75;
                    } else if ( k < ( 2.5 / 2.75 ) ) {
                        return 7.5625 * ( k -= ( 2.25 / 2.75 ) ) * k + 0.9375;
                    } else {
                        return 7.5625 * ( k -= ( 2.625 / 2.75 ) ) * k + 0.984375;
                    }
                }
            },
            elastic: {
                style: '',
                fn: function (k) {
                    var f = 0.22,
                        e = 0.4;
    
                    if ( k === 0 ) { return 0; }
                    if ( k == 1 ) { return 1; }
    
                    return ( e * Math.pow( 2, - 10 * k ) * Math.sin( ( k - f / 4 ) * ( 2 * Math.PI ) / f ) + 1 );
                }
            }
        });
    
        me.tap = function (e, eventName) {
            var ev = document.createEvent('Event');
            ev.initEvent(eventName, true, true);
            ev.pageX = e.pageX;
            ev.pageY = e.pageY;
            e.target.dispatchEvent(ev);
        };
    
        me.click = function (e) {
            var target = e.target,
                ev;
    
            if ( !(/(SELECT|INPUT|TEXTAREA)/i).test(target.tagName) ) {
                // https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/initMouseEvent
                // initMouseEvent is deprecated.
                ev = document.createEvent(window.MouseEvent ? 'MouseEvents' : 'Event');
                ev.initEvent('click', true, true);
                ev.view = e.view || window;
                ev.detail = 1;
                ev.screenX = target.screenX || 0;
                ev.screenY = target.screenY || 0;
                ev.clientX = target.clientX || 0;
                ev.clientY = target.clientY || 0;
                ev.ctrlKey = !!e.ctrlKey;
                ev.altKey = !!e.altKey;
                ev.shiftKey = !!e.shiftKey;
                ev.metaKey = !!e.metaKey;
                ev.button = 0;
                ev.relatedTarget = null;
                ev._constructed = true;
                target.dispatchEvent(ev);
            }
        };
    
        me.getTouchAction = function(eventPassthrough, addPinch) {
            var touchAction = 'none';
            if ( eventPassthrough === 'vertical' ) {
                touchAction = 'pan-y';
            } else if (eventPassthrough === 'horizontal' ) {
                touchAction = 'pan-x';
            }
            if (addPinch && touchAction != 'none') {
                // add pinch-zoom support if the browser supports it, but if not (eg. Chrome <55) do nothing
                touchAction += ' pinch-zoom';
            }
            return touchAction;
        };
    
        me.getRect = function(el) {
            if (el instanceof SVGElement) {
                var rect = el.getBoundingClientRect();
                return {
                    top : rect.top,
                    left : rect.left,
                    width : rect.width,
                    height : rect.height
                };
            } else {
                return {
                    top : el.offsetTop,
                    left : el.offsetLeft,
                    width : el.offsetWidth,
                    height : el.offsetHeight
                };
            }
        };
    
        return me;
    })();
    function IScroll (el, options) {
        this.wrapper = typeof el == 'string' ? document.querySelector(el) : el;
        this.scroller = this.wrapper.children[0];
        this.scrollerStyle = this.scroller.style;		// cache style for better performance
    
        this.options = {
    
            resizeScrollbars: true,
    
            mouseWheelSpeed: 20,
    
            snapThreshold: 0.334,
    
    // INSERT POINT: OPTIONS
            disablePointer : !utils.hasPointer,
            disableTouch : utils.hasPointer || !utils.hasTouch,
            disableMouse : utils.hasPointer || utils.hasTouch,
            startX: 0,
            startY: 0,
            scrollY: true,
            directionLockThreshold: 5,
            momentum: true,
    
            bounce: true,
            bounceTime: 600,
            bounceEasing: '',
    
            preventDefault: true,
            preventDefaultException: { tagName: /^(INPUT|TEXTAREA|BUTTON|SELECT)$/ },
    
            HWCompositing: true,
            useTransition: true,
            useTransform: true,
            bindToWrapper: typeof window.onmousedown === "undefined"
        };
    
        for ( var i in options ) {
            this.options[i] = options[i];
        }
    
        // Normalize options
        this.translateZ = this.options.HWCompositing && utils.hasPerspective ? ' translateZ(0)' : '';
    
        this.options.useTransition = utils.hasTransition && this.options.useTransition;
        this.options.useTransform = utils.hasTransform && this.options.useTransform;
    
        this.options.eventPassthrough = this.options.eventPassthrough === true ? 'vertical' : this.options.eventPassthrough;
        this.options.preventDefault = !this.options.eventPassthrough && this.options.preventDefault;
    
        // If you want eventPassthrough I have to lock one of the axes
        this.options.scrollY = this.options.eventPassthrough == 'vertical' ? false : this.options.scrollY;
        this.options.scrollX = this.options.eventPassthrough == 'horizontal' ? false : this.options.scrollX;
    
        // With eventPassthrough we also need lockDirection mechanism
        this.options.freeScroll = this.options.freeScroll && !this.options.eventPassthrough;
        this.options.directionLockThreshold = this.options.eventPassthrough ? 0 : this.options.directionLockThreshold;
    
        this.options.bounceEasing = typeof this.options.bounceEasing == 'string' ? utils.ease[this.options.bounceEasing] || utils.ease.circular : this.options.bounceEasing;
    
        this.options.resizePolling = this.options.resizePolling === undefined ? 60 : this.options.resizePolling;
    
        if ( this.options.tap === true ) {
            this.options.tap = 'tap';
        }
    
        // https://github.com/cubiq/iscroll/issues/1029
        if (!this.options.useTransition && !this.options.useTransform) {
            if(!(/relative|absolute/i).test(this.scrollerStyle.position)) {
                this.scrollerStyle.position = "relative";
            }
        }
    
        if ( this.options.shrinkScrollbars == 'scale' ) {
            this.options.useTransition = false;
        }
    
        this.options.invertWheelDirection = this.options.invertWheelDirection ? -1 : 1;
    
    // INSERT POINT: NORMALIZATION
    
        // Some defaults
        this.x = 0;
        this.y = 0;
        this.directionX = 0;
        this.directionY = 0;
        this._events = {};
    
    // INSERT POINT: DEFAULTS
    
        this._init();
        this.refresh();
    
        this.scrollTo(this.options.startX, this.options.startY);
        this.enable();
    }
    
    IScroll.prototype = {
        version: '5.2.0-snapshot',
    
        _init: function () {
            this._initEvents();
    
            if ( this.options.scrollbars || this.options.indicators ) {
                this._initIndicators();
            }
    
            if ( this.options.mouseWheel ) {
                this._initWheel();
            }
    
            if ( this.options.snap ) {
                this._initSnap();
            }
    
            if ( this.options.keyBindings ) {
                this._initKeys();
            }
    
    // INSERT POINT: _init
    
        },
    
        destroy: function () {
            this._initEvents(true);
            clearTimeout(this.resizeTimeout);
             this.resizeTimeout = null;
            this._execEvent('destroy');
        },
    
        _transitionEnd: function (e) {
            if ( e.target != this.scroller || !this.isInTransition ) {
                return;
            }
    
            this._transitionTime();
            if ( !this.resetPosition(this.options.bounceTime) ) {
                this.isInTransition = false;
                this._execEvent('scrollEnd');
            }
        },
    
        _start: function (e) {
            // React to left mouse button only
            if ( utils.eventType[e.type] != 1 ) {
              // for button property
              // http://unixpapa.com/js/mouse.html
              var button;
            if (!e.which) {
              /* IE case */
              button = (e.button < 2) ? 0 :
                       ((e.button == 4) ? 1 : 2);
            } else {
              /* All others */
              button = e.button;
            }
                if ( button !== 0 ) {
                    return;
                }
            }
    
            if ( !this.enabled || (this.initiated && utils.eventType[e.type] !== this.initiated) ) {
                return;
            }
    
            if ( this.options.preventDefault && !utils.isBadAndroid && !utils.preventDefaultException(e.target, this.options.preventDefaultException) ) {
                e.preventDefault();
            }
    
            var point = e.touches ? e.touches[0] : e,
                pos;
    
            this.initiated	= utils.eventType[e.type];
            this.moved		= false;
            this.distX		= 0;
            this.distY		= 0;
            this.directionX = 0;
            this.directionY = 0;
            this.directionLocked = 0;
    
            this.startTime = utils.getTime();
    
            if ( this.options.useTransition && this.isInTransition ) {
                this._transitionTime();
                this.isInTransition = false;
                pos = this.getComputedPosition();
                this._translate(Math.round(pos.x), Math.round(pos.y));
                this._execEvent('scrollEnd');
            } else if ( !this.options.useTransition && this.isAnimating ) {
                this.isAnimating = false;
                this._execEvent('scrollEnd');
            }
    
            this.startX    = this.x;
            this.startY    = this.y;
            this.absStartX = this.x;
            this.absStartY = this.y;
            this.pointX    = point.pageX;
            this.pointY    = point.pageY;
    
            this._execEvent('beforeScrollStart');
        },
    
        _move: function (e) {
            if ( !this.enabled || utils.eventType[e.type] !== this.initiated ) {
                return;
            }
    
            if ( this.options.preventDefault ) {	// increases performance on Android? TODO: check!
                e.preventDefault();
            }
    
            var point		= e.touches ? e.touches[0] : e,
                deltaX		= point.pageX - this.pointX,
                deltaY		= point.pageY - this.pointY,
                timestamp	= utils.getTime(),
                newX, newY,
                absDistX, absDistY;
    
            this.pointX		= point.pageX;
            this.pointY		= point.pageY;
    
            this.distX		+= deltaX;
            this.distY		+= deltaY;
            absDistX		= Math.abs(this.distX);
            absDistY		= Math.abs(this.distY);
    
            // We need to move at least 10 pixels for the scrolling to initiate
            if ( timestamp - this.endTime > 300 && (absDistX < 10 && absDistY < 10) ) {
                return;
            }
    
            // If you are scrolling in one direction lock the other
            if ( !this.directionLocked && !this.options.freeScroll ) {
                if ( absDistX > absDistY + this.options.directionLockThreshold ) {
                    this.directionLocked = 'h';		// lock horizontally
                } else if ( absDistY >= absDistX + this.options.directionLockThreshold ) {
                    this.directionLocked = 'v';		// lock vertically
                } else {
                    this.directionLocked = 'n';		// no lock
                }
            }
    
            if ( this.directionLocked == 'h' ) {
                if ( this.options.eventPassthrough == 'vertical' ) {
                    e.preventDefault();
                } else if ( this.options.eventPassthrough == 'horizontal' ) {
                    this.initiated = false;
                    return;
                }
    
                deltaY = 0;
            } else if ( this.directionLocked == 'v' ) {
                if ( this.options.eventPassthrough == 'horizontal' ) {
                    e.preventDefault();
                } else if ( this.options.eventPassthrough == 'vertical' ) {
                    this.initiated = false;
                    return;
                }
    
                deltaX = 0;
            }
    
            deltaX = this.hasHorizontalScroll ? deltaX : 0;
            deltaY = this.hasVerticalScroll ? deltaY : 0;
    
            newX = this.x + deltaX;
            newY = this.y + deltaY;
    
            // Slow down if outside of the boundaries
            if ( newX > 0 || newX < this.maxScrollX ) {
                newX = this.options.bounce ? this.x + deltaX / 3 : newX > 0 ? 0 : this.maxScrollX;
            }
            if ( newY > 0 || newY < this.maxScrollY ) {
                newY = this.options.bounce ? this.y + deltaY / 3 : newY > 0 ? 0 : this.maxScrollY;
            }
    
            this.directionX = deltaX > 0 ? -1 : deltaX < 0 ? 1 : 0;
            this.directionY = deltaY > 0 ? -1 : deltaY < 0 ? 1 : 0;
    
            if ( !this.moved ) {
                this._execEvent('scrollStart');
            }
    
            this.moved = true;
    
            this._translate(newX, newY);
    
    /* REPLACE START: _move */
    
            if ( timestamp - this.startTime > 300 ) {
                this.startTime = timestamp;
                this.startX = this.x;
                this.startY = this.y;
            }
    
    /* REPLACE END: _move */
    
        },
    
        _end: function (e) {
            if ( !this.enabled || utils.eventType[e.type] !== this.initiated ) {
                return;
            }
    
            if ( this.options.preventDefault && !utils.preventDefaultException(e.target, this.options.preventDefaultException) ) {
                e.preventDefault();
            }
    
            var point = e.changedTouches ? e.changedTouches[0] : e,
                momentumX,
                momentumY,
                duration = utils.getTime() - this.startTime,
                newX = Math.round(this.x),
                newY = Math.round(this.y),
                distanceX = Math.abs(newX - this.startX),
                distanceY = Math.abs(newY - this.startY),
                time = 0,
                easing = '';
    
            this.isInTransition = 0;
            this.initiated = 0;
            this.endTime = utils.getTime();
    
            // reset if we are outside of the boundaries
            if ( this.resetPosition(this.options.bounceTime) ) {
                return;
            }
    
            this.scrollTo(newX, newY);	// ensures that the last position is rounded
    
            // we scrolled less than 10 pixels
            if ( !this.moved ) {
                if ( this.options.tap ) {
                    utils.tap(e, this.options.tap);
                }
    
                if ( this.options.click ) {
                    utils.click(e);
                }
    
                this._execEvent('scrollCancel');
                return;
            }
    
            if ( this._events.flick && duration < 200 && distanceX < 100 && distanceY < 100 ) {
                this._execEvent('flick');
                return;
            }
    
            // start momentum animation if needed
            if ( this.options.momentum && duration < 300 ) {
                momentumX = this.hasHorizontalScroll ? utils.momentum(this.x, this.startX, duration, this.maxScrollX, this.options.bounce ? this.wrapperWidth : 0, this.options.deceleration) : { destination: newX, duration: 0 };
                momentumY = this.hasVerticalScroll ? utils.momentum(this.y, this.startY, duration, this.maxScrollY, this.options.bounce ? this.wrapperHeight : 0, this.options.deceleration) : { destination: newY, duration: 0 };
                newX = momentumX.destination;
                newY = momentumY.destination;
                time = Math.max(momentumX.duration, momentumY.duration);
                this.isInTransition = 1;
            }
    
    
            if ( this.options.snap ) {
                var snap = this._nearestSnap(newX, newY);
                this.currentPage = snap;
                time = this.options.snapSpeed || Math.max(
                        Math.max(
                            Math.min(Math.abs(newX - snap.x), 1000),
                            Math.min(Math.abs(newY - snap.y), 1000)
                        ), 300);
                newX = snap.x;
                newY = snap.y;
    
                this.directionX = 0;
                this.directionY = 0;
                easing = this.options.bounceEasing;
            }
    
    // INSERT POINT: _end
    
            if ( newX != this.x || newY != this.y ) {
                // change easing function when scroller goes out of the boundaries
                if ( newX > 0 || newX < this.maxScrollX || newY > 0 || newY < this.maxScrollY ) {
                    easing = utils.ease.quadratic;
                }
    
                this.scrollTo(newX, newY, time, easing);
                return;
            }
    
            this._execEvent('scrollEnd');
        },
    
        _resize: function () {
            var that = this;
    
            clearTimeout(this.resizeTimeout);
    
            this.resizeTimeout = setTimeout(function () {
                that.refresh();
            }, this.options.resizePolling);
        },
    
        resetPosition: function (time) {
            var x = this.x,
                y = this.y;
    
            time = time || 0;
    
            if ( !this.hasHorizontalScroll || this.x > 0 ) {
                x = 0;
            } else if ( this.x < this.maxScrollX ) {
                x = this.maxScrollX;
            }
    
            if ( !this.hasVerticalScroll || this.y > 0 ) {
                y = 0;
            } else if ( this.y < this.maxScrollY ) {
                y = this.maxScrollY;
            }
    
            if ( x == this.x && y == this.y ) {
                return false;
            }
    
            this.scrollTo(x, y, time, this.options.bounceEasing);
    
            return true;
        },
    
        disable: function () {
            this.enabled = false;
        },
    
        enable: function () {
            this.enabled = true;
        },
    
        refresh: function () {
            utils.getRect(this.wrapper);		// Force reflow
    
            this.wrapperWidth	= this.wrapper.clientWidth;
            this.wrapperHeight	= this.wrapper.clientHeight;
    
            var rect = utils.getRect(this.scroller);
    /* REPLACE START: refresh */
    
            this.scrollerWidth	= rect.width;
            this.scrollerHeight	= rect.height;
    
            this.maxScrollX		= this.wrapperWidth - this.scrollerWidth;
            this.maxScrollY		= this.wrapperHeight - this.scrollerHeight;
    
    /* REPLACE END: refresh */
    
            this.hasHorizontalScroll	= this.options.scrollX && this.maxScrollX < 0;
            this.hasVerticalScroll		= this.options.scrollY && this.maxScrollY < 0;
            
            if ( !this.hasHorizontalScroll ) {
                this.maxScrollX = 0;
                this.scrollerWidth = this.wrapperWidth;
            }
    
            if ( !this.hasVerticalScroll ) {
                this.maxScrollY = 0;
                this.scrollerHeight = this.wrapperHeight;
            }
    
            this.endTime = 0;
            this.directionX = 0;
            this.directionY = 0;
            
            if(utils.hasPointer && !this.options.disablePointer) {
                // The wrapper should have `touchAction` property for using pointerEvent.
                this.wrapper.style[utils.style.touchAction] = utils.getTouchAction(this.options.eventPassthrough, true);
    
                // case. not support 'pinch-zoom'
                // https://github.com/cubiq/iscroll/issues/1118#issuecomment-270057583
                if (!this.wrapper.style[utils.style.touchAction]) {
                    this.wrapper.style[utils.style.touchAction] = utils.getTouchAction(this.options.eventPassthrough, false);
                }
            }
            this.wrapperOffset = utils.offset(this.wrapper);
    
            this._execEvent('refresh');
    
            this.resetPosition();
    
    // INSERT POINT: _refresh
    
        },	
    
        on: function (type, fn) {
            if ( !this._events[type] ) {
                this._events[type] = [];
            }
    
            this._events[type].push(fn);
        },
    
        off: function (type, fn) {
            if ( !this._events[type] ) {
                return;
            }
    
            var index = this._events[type].indexOf(fn);
    
            if ( index > -1 ) {
                this._events[type].splice(index, 1);
            }
        },
    
        _execEvent: function (type) {
            if ( !this._events[type] ) {
                return;
            }
    
            var i = 0,
                l = this._events[type].length;
    
            if ( !l ) {
                return;
            }
    
            for ( ; i < l; i++ ) {
                this._events[type][i].apply(this, [].slice.call(arguments, 1));
            }
        },
    
        scrollBy: function (x, y, time, easing) {
            x = this.x + x;
            y = this.y + y;
            time = time || 0;
    
            this.scrollTo(x, y, time, easing);
        },
    
        scrollTo: function (x, y, time, easing) {
            easing = easing || utils.ease.circular;
    
            this.isInTransition = this.options.useTransition && time > 0;
            var transitionType = this.options.useTransition && easing.style;
            if ( !time || transitionType ) {
                    if(transitionType) {
                        this._transitionTimingFunction(easing.style);
                        this._transitionTime(time);
                    }
                this._translate(x, y);
            } else {
                this._animate(x, y, time, easing.fn);
            }
        },
    
        scrollToElement: function (el, time, offsetX, offsetY, easing) {
            el = el.nodeType ? el : this.scroller.querySelector(el);
    
            if ( !el ) {
                return;
            }
    
            var pos = utils.offset(el);
    
            pos.left -= this.wrapperOffset.left;
            pos.top  -= this.wrapperOffset.top;
    
            // if offsetX/Y are true we center the element to the screen
            var elRect = utils.getRect(el);
            var wrapperRect = utils.getRect(this.wrapper);
            if ( offsetX === true ) {
                offsetX = Math.round(elRect.width / 2 - wrapperRect.width / 2);
            }
            if ( offsetY === true ) {
                offsetY = Math.round(elRect.height / 2 - wrapperRect.height / 2);
            }
    
            pos.left -= offsetX || 0;
            pos.top  -= offsetY || 0;
    
            pos.left = pos.left > 0 ? 0 : pos.left < this.maxScrollX ? this.maxScrollX : pos.left;
            pos.top  = pos.top  > 0 ? 0 : pos.top  < this.maxScrollY ? this.maxScrollY : pos.top;
    
            time = time === undefined || time === null || time === 'auto' ? Math.max(Math.abs(this.x-pos.left), Math.abs(this.y-pos.top)) : time;
    
            this.scrollTo(pos.left, pos.top, time, easing);
        },
    
        _transitionTime: function (time) {
            if (!this.options.useTransition) {
                return;
            }
            time = time || 0;
            var durationProp = utils.style.transitionDuration;
            if(!durationProp) {
                return;
            }
    
            this.scrollerStyle[durationProp] = time + 'ms';
    
            if ( !time && utils.isBadAndroid ) {
                this.scrollerStyle[durationProp] = '0.0001ms';
                // remove 0.0001ms
                var self = this;
                rAF(function() {
                    if(self.scrollerStyle[durationProp] === '0.0001ms') {
                        self.scrollerStyle[durationProp] = '0s';
                    }
                });
            }
    
    
            if ( this.indicators ) {
                for ( var i = this.indicators.length; i--; ) {
                    this.indicators[i].transitionTime(time);
                }
            }
    
    
    // INSERT POINT: _transitionTime
    
        },
    
        _transitionTimingFunction: function (easing) {
            this.scrollerStyle[utils.style.transitionTimingFunction] = easing;
    
    
            if ( this.indicators ) {
                for ( var i = this.indicators.length; i--; ) {
                    this.indicators[i].transitionTimingFunction(easing);
                }
            }
    
    
    // INSERT POINT: _transitionTimingFunction
    
        },
    
        _translate: function (x, y) {
            if ( this.options.useTransform ) {
    
    /* REPLACE START: _translate */
    
                this.scrollerStyle[utils.style.transform] = 'translate(' + x + 'px,' + y + 'px)' + this.translateZ;
    
    /* REPLACE END: _translate */
    
            } else {
                x = Math.round(x);
                y = Math.round(y);
                this.scrollerStyle.left = x + 'px';
                this.scrollerStyle.top = y + 'px';
            }
    
            this.x = x;
            this.y = y;
    
    
        if ( this.indicators ) {
            for ( var i = this.indicators.length; i--; ) {
                this.indicators[i].updatePosition();
            }
        }
    
    
    // INSERT POINT: _translate
    
        },
    
        _initEvents: function (remove) {
            var eventType = remove ? utils.removeEvent : utils.addEvent,
                target = this.options.bindToWrapper ? this.wrapper : window;
    
            eventType(window, 'orientationchange', this);
            eventType(window, 'resize', this);
    
            if ( this.options.click ) {
                eventType(this.wrapper, 'click', this, true);
            }
    
            if ( !this.options.disableMouse ) {
                eventType(this.wrapper, 'mousedown', this);
                eventType(target, 'mousemove', this);
                eventType(target, 'mousecancel', this);
                eventType(target, 'mouseup', this);
            }
    
            if ( utils.hasPointer && !this.options.disablePointer ) {
                eventType(this.wrapper, utils.prefixPointerEvent('pointerdown'), this);
                eventType(target, utils.prefixPointerEvent('pointermove'), this);
                eventType(target, utils.prefixPointerEvent('pointercancel'), this);
                eventType(target, utils.prefixPointerEvent('pointerup'), this);
            }
    
            if ( utils.hasTouch && !this.options.disableTouch ) {
                eventType(this.wrapper, 'touchstart', this);
                eventType(target, 'touchmove', this);
                eventType(target, 'touchcancel', this);
                eventType(target, 'touchend', this);
            }
    
            eventType(this.scroller, 'transitionend', this);
            eventType(this.scroller, 'webkitTransitionEnd', this);
            eventType(this.scroller, 'oTransitionEnd', this);
            eventType(this.scroller, 'MSTransitionEnd', this);
        },
    
        getComputedPosition: function () {
            var matrix = window.getComputedStyle(this.scroller, null),
                x, y;
    
            if ( this.options.useTransform ) {
                matrix = matrix[utils.style.transform].split(')')[0].split(', ');
                x = +(matrix[12] || matrix[4]);
                y = +(matrix[13] || matrix[5]);
            } else {
                x = +matrix.left.replace(/[^-\d.]/g, '');
                y = +matrix.top.replace(/[^-\d.]/g, '');
            }
    
            return { x: x, y: y };
        },
        _initIndicators: function () {
            var interactive = this.options.interactiveScrollbars,
                customStyle = typeof this.options.scrollbars != 'string',
                indicators = [],
                indicator;
    
            var that = this;
    
            this.indicators = [];
    
            if ( this.options.scrollbars ) {
                // Vertical scrollbar
                if ( this.options.scrollY ) {
                    indicator = {
                        el: createDefaultScrollbar('v', interactive, this.options.scrollbars),
                        interactive: interactive,
                        defaultScrollbars: true,
                        customStyle: customStyle,
                        resize: this.options.resizeScrollbars,
                        shrink: this.options.shrinkScrollbars,
                        fade: this.options.fadeScrollbars,
                        listenX: false
                    };
    
                    this.wrapper.appendChild(indicator.el);
                    indicators.push(indicator);
                }
    
                // Horizontal scrollbar
                if ( this.options.scrollX ) {
                    indicator = {
                        el: createDefaultScrollbar('h', interactive, this.options.scrollbars),
                        interactive: interactive,
                        defaultScrollbars: true,
                        customStyle: customStyle,
                        resize: this.options.resizeScrollbars,
                        shrink: this.options.shrinkScrollbars,
                        fade: this.options.fadeScrollbars,
                        listenY: false
                    };
    
                    this.wrapper.appendChild(indicator.el);
                    indicators.push(indicator);
                }
            }
    
            if ( this.options.indicators ) {
                // TODO: check concat compatibility
                indicators = indicators.concat(this.options.indicators);
            }
    
            for ( var i = indicators.length; i--; ) {
                this.indicators.push( new Indicator(this, indicators[i]) );
            }
    
            // TODO: check if we can use array.map (wide compatibility and performance issues)
            function _indicatorsMap (fn) {
                if (that.indicators) {
                    for ( var i = that.indicators.length; i--; ) {
                        fn.call(that.indicators[i]);
                    }
                }
            }
    
            if ( this.options.fadeScrollbars ) {
                this.on('scrollEnd', function () {
                    _indicatorsMap(function () {
                        this.fade();
                    });
                });
    
                this.on('scrollCancel', function () {
                    _indicatorsMap(function () {
                        this.fade();
                    });
                });
    
                this.on('scrollStart', function () {
                    _indicatorsMap(function () {
                        this.fade(1);
                    });
                });
    
                this.on('beforeScrollStart', function () {
                    _indicatorsMap(function () {
                        this.fade(1, true);
                    });
                });
            }
    
    
            this.on('refresh', function () {
                _indicatorsMap(function () {
                    this.refresh();
                });
            });
    
            this.on('destroy', function () {
                _indicatorsMap(function () {
                    this.destroy();
                });
    
                delete this.indicators;
            });
        },
    
        _initWheel: function () {
            utils.addEvent(this.wrapper, 'wheel', this);
            utils.addEvent(this.wrapper, 'mousewheel', this);
            utils.addEvent(this.wrapper, 'DOMMouseScroll', this);
    
            this.on('destroy', function () {
                clearTimeout(this.wheelTimeout);
                this.wheelTimeout = null;
                utils.removeEvent(this.wrapper, 'wheel', this);
                utils.removeEvent(this.wrapper, 'mousewheel', this);
                utils.removeEvent(this.wrapper, 'DOMMouseScroll', this);
            });
        },
    
        _wheel: function (e) {
            if ( !this.enabled ) {
                return;
            }
    
            e.preventDefault();
    
            var wheelDeltaX, wheelDeltaY,
                newX, newY,
                that = this;
    
            if ( this.wheelTimeout === undefined ) {
                that._execEvent('scrollStart');
            }
    
            // Execute the scrollEnd event after 400ms the wheel stopped scrolling
            clearTimeout(this.wheelTimeout);
            this.wheelTimeout = setTimeout(function () {
                if(!that.options.snap) {
                    that._execEvent('scrollEnd');
                }
                that.wheelTimeout = undefined;
            }, 400);
    
            if ( 'deltaX' in e ) {
                if (e.deltaMode === 1) {
                    wheelDeltaX = -e.deltaX * this.options.mouseWheelSpeed;
                    wheelDeltaY = -e.deltaY * this.options.mouseWheelSpeed;
                } else {
                    wheelDeltaX = -e.deltaX;
                    wheelDeltaY = -e.deltaY;
                }
            } else if ( 'wheelDeltaX' in e ) {
                wheelDeltaX = e.wheelDeltaX / 120 * this.options.mouseWheelSpeed;
                wheelDeltaY = e.wheelDeltaY / 120 * this.options.mouseWheelSpeed;
            } else if ( 'wheelDelta' in e ) {
                wheelDeltaX = wheelDeltaY = e.wheelDelta / 120 * this.options.mouseWheelSpeed;
            } else if ( 'detail' in e ) {
                wheelDeltaX = wheelDeltaY = -e.detail / 3 * this.options.mouseWheelSpeed;
            } else {
                return;
            }
    
            wheelDeltaX *= this.options.invertWheelDirection;
            wheelDeltaY *= this.options.invertWheelDirection;
    
            if ( !this.hasVerticalScroll ) {
                wheelDeltaX = wheelDeltaY;
                wheelDeltaY = 0;
            }
    
            if ( this.options.snap ) {
                newX = this.currentPage.pageX;
                newY = this.currentPage.pageY;
    
                if ( wheelDeltaX > 0 ) {
                    newX--;
                } else if ( wheelDeltaX < 0 ) {
                    newX++;
                }
    
                if ( wheelDeltaY > 0 ) {
                    newY--;
                } else if ( wheelDeltaY < 0 ) {
                    newY++;
                }
    
                this.goToPage(newX, newY);
    
                return;
            }
    
            newX = this.x + Math.round(this.hasHorizontalScroll ? wheelDeltaX : 0);
            newY = this.y + Math.round(this.hasVerticalScroll ? wheelDeltaY : 0);
    
            this.directionX = wheelDeltaX > 0 ? -1 : wheelDeltaX < 0 ? 1 : 0;
            this.directionY = wheelDeltaY > 0 ? -1 : wheelDeltaY < 0 ? 1 : 0;
    
            if ( newX > 0 ) {
                newX = 0;
            } else if ( newX < this.maxScrollX ) {
                newX = this.maxScrollX;
            }
    
            if ( newY > 0 ) {
                newY = 0;
            } else if ( newY < this.maxScrollY ) {
                newY = this.maxScrollY;
            }
    
            this.scrollTo(newX, newY, 0);
    
    // INSERT POINT: _wheel
        },
    
        _initSnap: function () {
            this.currentPage = {};
    
            if ( typeof this.options.snap == 'string' ) {
                this.options.snap = this.scroller.querySelectorAll(this.options.snap);
            }
    
            this.on('refresh', function () {
                var i = 0, l,
                    m = 0, n,
                    cx, cy,
                    x = 0, y,
                    stepX = this.options.snapStepX || this.wrapperWidth,
                    stepY = this.options.snapStepY || this.wrapperHeight,
                    el,
                    rect;
    
                this.pages = [];
    
                if ( !this.wrapperWidth || !this.wrapperHeight || !this.scrollerWidth || !this.scrollerHeight ) {
                    return;
                }
    
                if ( this.options.snap === true ) {
                    cx = Math.round( stepX / 2 );
                    cy = Math.round( stepY / 2 );
    
                    while ( x > -this.scrollerWidth ) {
                        this.pages[i] = [];
                        l = 0;
                        y = 0;
    
                        while ( y > -this.scrollerHeight ) {
                            this.pages[i][l] = {
                                x: Math.max(x, this.maxScrollX),
                                y: Math.max(y, this.maxScrollY),
                                width: stepX,
                                height: stepY,
                                cx: x - cx,
                                cy: y - cy
                            };
    
                            y -= stepY;
                            l++;
                        }
    
                        x -= stepX;
                        i++;
                    }
                } else {
                    el = this.options.snap;
                    l = el.length;
                    n = -1;
    
                    for ( ; i < l; i++ ) {
                        rect = utils.getRect(el[i]);
                        if ( i === 0 || rect.left <= utils.getRect(el[i-1]).left ) {
                            m = 0;
                            n++;
                        }
    
                        if ( !this.pages[m] ) {
                            this.pages[m] = [];
                        }
    
                        x = Math.max(-rect.left, this.maxScrollX);
                        y = Math.max(-rect.top, this.maxScrollY);
                        cx = x - Math.round(rect.width / 2);
                        cy = y - Math.round(rect.height / 2);
    
                        this.pages[m][n] = {
                            x: x,
                            y: y,
                            width: rect.width,
                            height: rect.height,
                            cx: cx,
                            cy: cy
                        };
    
                        if ( x > this.maxScrollX ) {
                            m++;
                        }
                    }
                }
    
                this.goToPage(this.currentPage.pageX || 0, this.currentPage.pageY || 0, 0);
    
                // Update snap threshold if needed
                if ( this.options.snapThreshold % 1 === 0 ) {
                    this.snapThresholdX = this.options.snapThreshold;
                    this.snapThresholdY = this.options.snapThreshold;
                } else {
                    this.snapThresholdX = Math.round(this.pages[this.currentPage.pageX][this.currentPage.pageY].width * this.options.snapThreshold);
                    this.snapThresholdY = Math.round(this.pages[this.currentPage.pageX][this.currentPage.pageY].height * this.options.snapThreshold);
                }
            });
    
            this.on('flick', function () {
                var time = this.options.snapSpeed || Math.max(
                        Math.max(
                            Math.min(Math.abs(this.x - this.startX), 1000),
                            Math.min(Math.abs(this.y - this.startY), 1000)
                        ), 300);
    
                this.goToPage(
                    this.currentPage.pageX + this.directionX,
                    this.currentPage.pageY + this.directionY,
                    time
                );
            });
        },
    
        _nearestSnap: function (x, y) {
            if ( !this.pages.length ) {
                return { x: 0, y: 0, pageX: 0, pageY: 0 };
            }
    
            var i = 0,
                l = this.pages.length,
                m = 0;
    
            // Check if we exceeded the snap threshold
            if ( Math.abs(x - this.absStartX) < this.snapThresholdX &&
                Math.abs(y - this.absStartY) < this.snapThresholdY ) {
                return this.currentPage;
            }
    
            if ( x > 0 ) {
                x = 0;
            } else if ( x < this.maxScrollX ) {
                x = this.maxScrollX;
            }
    
            if ( y > 0 ) {
                y = 0;
            } else if ( y < this.maxScrollY ) {
                y = this.maxScrollY;
            }
    
            for ( ; i < l; i++ ) {
                if ( x >= this.pages[i][0].cx ) {
                    x = this.pages[i][0].x;
                    break;
                }
            }
    
            l = this.pages[i].length;
    
            for ( ; m < l; m++ ) {
                if ( y >= this.pages[0][m].cy ) {
                    y = this.pages[0][m].y;
                    break;
                }
            }
    
            if ( i == this.currentPage.pageX ) {
                i += this.directionX;
    
                if ( i < 0 ) {
                    i = 0;
                } else if ( i >= this.pages.length ) {
                    i = this.pages.length - 1;
                }
    
                x = this.pages[i][0].x;
            }
    
            if ( m == this.currentPage.pageY ) {
                m += this.directionY;
    
                if ( m < 0 ) {
                    m = 0;
                } else if ( m >= this.pages[0].length ) {
                    m = this.pages[0].length - 1;
                }
    
                y = this.pages[0][m].y;
            }
    
            return {
                x: x,
                y: y,
                pageX: i,
                pageY: m
            };
        },
    
        goToPage: function (x, y, time, easing) {
            easing = easing || this.options.bounceEasing;
    
            if ( x >= this.pages.length ) {
                x = this.pages.length - 1;
            } else if ( x < 0 ) {
                x = 0;
            }
    
            if ( y >= this.pages[x].length ) {
                y = this.pages[x].length - 1;
            } else if ( y < 0 ) {
                y = 0;
            }
    
            var posX = this.pages[x][y].x,
                posY = this.pages[x][y].y;
    
            time = time === undefined ? this.options.snapSpeed || Math.max(
                Math.max(
                    Math.min(Math.abs(posX - this.x), 1000),
                    Math.min(Math.abs(posY - this.y), 1000)
                ), 300) : time;
    
            this.currentPage = {
                x: posX,
                y: posY,
                pageX: x,
                pageY: y
            };
    
            this.scrollTo(posX, posY, time, easing);
        },
    
        next: function (time, easing) {
            var x = this.currentPage.pageX,
                y = this.currentPage.pageY;
    
            x++;
    
            if ( x >= this.pages.length && this.hasVerticalScroll ) {
                x = 0;
                y++;
            }
    
            this.goToPage(x, y, time, easing);
        },
    
        prev: function (time, easing) {
            var x = this.currentPage.pageX,
                y = this.currentPage.pageY;
    
            x--;
    
            if ( x < 0 && this.hasVerticalScroll ) {
                x = 0;
                y--;
            }
    
            this.goToPage(x, y, time, easing);
        },
    
        _initKeys: function (e) {
            // default key bindings
            var keys = {
                pageUp: 33,
                pageDown: 34,
                end: 35,
                home: 36,
                left: 37,
                up: 38,
                right: 39,
                down: 40
            };
            var i;
    
            // if you give me characters I give you keycode
            if ( typeof this.options.keyBindings == 'object' ) {
                for ( i in this.options.keyBindings ) {
                    if ( typeof this.options.keyBindings[i] == 'string' ) {
                        this.options.keyBindings[i] = this.options.keyBindings[i].toUpperCase().charCodeAt(0);
                    }
                }
            } else {
                this.options.keyBindings = {};
            }
    
            for ( i in keys ) {
                this.options.keyBindings[i] = this.options.keyBindings[i] || keys[i];
            }
    
            utils.addEvent(window, 'keydown', this);
    
            this.on('destroy', function () {
                utils.removeEvent(window, 'keydown', this);
            });
        },
    
        _key: function (e) {
            if ( !this.enabled ) {
                return;
            }
    
            var snap = this.options.snap,	// we are using this alot, better to cache it
                newX = snap ? this.currentPage.pageX : this.x,
                newY = snap ? this.currentPage.pageY : this.y,
                now = utils.getTime(),
                prevTime = this.keyTime || 0,
                acceleration = 0.250,
                pos;
    
            if ( this.options.useTransition && this.isInTransition ) {
                pos = this.getComputedPosition();
    
                this._translate(Math.round(pos.x), Math.round(pos.y));
                this.isInTransition = false;
            }
    
            this.keyAcceleration = now - prevTime < 200 ? Math.min(this.keyAcceleration + acceleration, 50) : 0;
    
            switch ( e.keyCode ) {
                case this.options.keyBindings.pageUp:
                    if ( this.hasHorizontalScroll && !this.hasVerticalScroll ) {
                        newX += snap ? 1 : this.wrapperWidth;
                    } else {
                        newY += snap ? 1 : this.wrapperHeight;
                    }
                    break;
                case this.options.keyBindings.pageDown:
                    if ( this.hasHorizontalScroll && !this.hasVerticalScroll ) {
                        newX -= snap ? 1 : this.wrapperWidth;
                    } else {
                        newY -= snap ? 1 : this.wrapperHeight;
                    }
                    break;
                case this.options.keyBindings.end:
                    newX = snap ? this.pages.length-1 : this.maxScrollX;
                    newY = snap ? this.pages[0].length-1 : this.maxScrollY;
                    break;
                case this.options.keyBindings.home:
                    newX = 0;
                    newY = 0;
                    break;
                case this.options.keyBindings.left:
                    newX += snap ? -1 : 5 + this.keyAcceleration>>0;
                    break;
                case this.options.keyBindings.up:
                    newY += snap ? 1 : 5 + this.keyAcceleration>>0;
                    break;
                case this.options.keyBindings.right:
                    newX -= snap ? -1 : 5 + this.keyAcceleration>>0;
                    break;
                case this.options.keyBindings.down:
                    newY -= snap ? 1 : 5 + this.keyAcceleration>>0;
                    break;
                default:
                    return;
            }
    
            if ( snap ) {
                this.goToPage(newX, newY);
                return;
            }
    
            if ( newX > 0 ) {
                newX = 0;
                this.keyAcceleration = 0;
            } else if ( newX < this.maxScrollX ) {
                newX = this.maxScrollX;
                this.keyAcceleration = 0;
            }
    
            if ( newY > 0 ) {
                newY = 0;
                this.keyAcceleration = 0;
            } else if ( newY < this.maxScrollY ) {
                newY = this.maxScrollY;
                this.keyAcceleration = 0;
            }
    
            this.scrollTo(newX, newY, 0);
    
            this.keyTime = now;
        },
    
        _animate: function (destX, destY, duration, easingFn) {
            var that = this,
                startX = this.x,
                startY = this.y,
                startTime = utils.getTime(),
                destTime = startTime + duration;
    
            function step () {
                var now = utils.getTime(),
                    newX, newY,
                    easing;
    
                if ( now >= destTime ) {
                    that.isAnimating = false;
                    that._translate(destX, destY);
    
                    if ( !that.resetPosition(that.options.bounceTime) ) {
                        that._execEvent('scrollEnd');
                    }
    
                    return;
                }
    
                now = ( now - startTime ) / duration;
                easing = easingFn(now);
                newX = ( destX - startX ) * easing + startX;
                newY = ( destY - startY ) * easing + startY;
                that._translate(newX, newY);
    
                if ( that.isAnimating ) {
                    rAF(step);
                }
            }
    
            this.isAnimating = true;
            step();
        },
        handleEvent: function (e) {
            switch ( e.type ) {
                case 'touchstart':
                case 'pointerdown':
                case 'MSPointerDown':
                case 'mousedown':
                    this._start(e);
                    break;
                case 'touchmove':
                case 'pointermove':
                case 'MSPointerMove':
                case 'mousemove':
                    this._move(e);
                    break;
                case 'touchend':
                case 'pointerup':
                case 'MSPointerUp':
                case 'mouseup':
                case 'touchcancel':
                case 'pointercancel':
                case 'MSPointerCancel':
                case 'mousecancel':
                    this._end(e);
                    break;
                case 'orientationchange':
                case 'resize':
                    this._resize();
                    break;
                case 'transitionend':
                case 'webkitTransitionEnd':
                case 'oTransitionEnd':
                case 'MSTransitionEnd':
                    this._transitionEnd(e);
                    break;
                case 'wheel':
                case 'DOMMouseScroll':
                case 'mousewheel':
                    this._wheel(e);
                    break;
                case 'keydown':
                    this._key(e);
                    break;
                case 'click':
                    if ( this.enabled && !e._constructed ) {
                        e.preventDefault();
                        e.stopPropagation();
                    }
                    break;
            }
        }
    };
    function createDefaultScrollbar (direction, interactive, type) {
        var scrollbar = document.createElement('div'),
            indicator = document.createElement('div');
    
        if ( type === true ) {
            scrollbar.style.cssText = 'position:absolute;z-index:9999';
            indicator.style.cssText = '-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box;position:absolute;background:rgba(0,0,0,0.5);border:1px solid rgba(255,255,255,0.9);border-radius:3px';
        }
    
        indicator.className = 'iScrollIndicator';
    
        if ( direction == 'h' ) {
            if ( type === true ) {
                scrollbar.style.cssText += ';height:7px;left:2px;right:2px;bottom:0';
                indicator.style.height = '100%';
            }
            scrollbar.className = 'iScrollHorizontalScrollbar';
        } else {
            if ( type === true ) {
                scrollbar.style.cssText += ';width:7px;bottom:2px;top:2px;right:1px';
                indicator.style.width = '100%';
            }
            scrollbar.className = 'iScrollVerticalScrollbar';
        }
    
        scrollbar.style.cssText += ';overflow:hidden';
    
        if ( !interactive ) {
            scrollbar.style.pointerEvents = 'none';
        }
    
        scrollbar.appendChild(indicator);
    
        return scrollbar;
    }
    
    function Indicator (scroller, options) {
        this.wrapper = typeof options.el == 'string' ? document.querySelector(options.el) : options.el;
        this.wrapperStyle = this.wrapper.style;
        this.indicator = this.wrapper.children[0];
        this.indicatorStyle = this.indicator.style;
        this.scroller = scroller;
    
        this.options = {
            listenX: true,
            listenY: true,
            interactive: false,
            resize: true,
            defaultScrollbars: false,
            shrink: false,
            fade: false,
            speedRatioX: 0,
            speedRatioY: 0
        };
    
        for ( var i in options ) {
            this.options[i] = options[i];
        }
    
        this.sizeRatioX = 1;
        this.sizeRatioY = 1;
        this.maxPosX = 0;
        this.maxPosY = 0;
    
        if ( this.options.interactive ) {
            if ( !this.options.disableTouch ) {
                utils.addEvent(this.indicator, 'touchstart', this);
                utils.addEvent(window, 'touchend', this);
            }
            if ( !this.options.disablePointer ) {
                utils.addEvent(this.indicator, utils.prefixPointerEvent('pointerdown'), this);
                utils.addEvent(window, utils.prefixPointerEvent('pointerup'), this);
            }
            if ( !this.options.disableMouse ) {
                utils.addEvent(this.indicator, 'mousedown', this);
                utils.addEvent(window, 'mouseup', this);
            }
        }
    
        if ( this.options.fade ) {
            this.wrapperStyle[utils.style.transform] = this.scroller.translateZ;
            var durationProp = utils.style.transitionDuration;
            if(!durationProp) {
                return;
            }
            this.wrapperStyle[durationProp] = utils.isBadAndroid ? '0.0001ms' : '0ms';
            // remove 0.0001ms
            var self = this;
            if(utils.isBadAndroid) {
                rAF(function() {
                    if(self.wrapperStyle[durationProp] === '0.0001ms') {
                        self.wrapperStyle[durationProp] = '0s';
                    }
                });
            }
            this.wrapperStyle.opacity = '0';
        }
    }
    
    Indicator.prototype = {
        handleEvent: function (e) {
            switch ( e.type ) {
                case 'touchstart':
                case 'pointerdown':
                case 'MSPointerDown':
                case 'mousedown':
                    this._start(e);
                    break;
                case 'touchmove':
                case 'pointermove':
                case 'MSPointerMove':
                case 'mousemove':
                    this._move(e);
                    break;
                case 'touchend':
                case 'pointerup':
                case 'MSPointerUp':
                case 'mouseup':
                case 'touchcancel':
                case 'pointercancel':
                case 'MSPointerCancel':
                case 'mousecancel':
                    this._end(e);
                    break;
            }
        },
    
        destroy: function () {
            if ( this.options.fadeScrollbars ) {
                clearTimeout(this.fadeTimeout);
                this.fadeTimeout = null;
            }
            if ( this.options.interactive ) {
                utils.removeEvent(this.indicator, 'touchstart', this);
                utils.removeEvent(this.indicator, utils.prefixPointerEvent('pointerdown'), this);
                utils.removeEvent(this.indicator, 'mousedown', this);
    
                utils.removeEvent(window, 'touchmove', this);
                utils.removeEvent(window, utils.prefixPointerEvent('pointermove'), this);
                utils.removeEvent(window, 'mousemove', this);
    
                utils.removeEvent(window, 'touchend', this);
                utils.removeEvent(window, utils.prefixPointerEvent('pointerup'), this);
                utils.removeEvent(window, 'mouseup', this);
            }
    
            if ( this.options.defaultScrollbars && this.wrapper.parentNode ) {
                this.wrapper.parentNode.removeChild(this.wrapper);
            }
        },
    
        _start: function (e) {
            var point = e.touches ? e.touches[0] : e;
    
            e.preventDefault();
            e.stopPropagation();
    
            this.transitionTime();
    
            this.initiated = true;
            this.moved = false;
            this.lastPointX	= point.pageX;
            this.lastPointY	= point.pageY;
    
            this.startTime	= utils.getTime();
    
            if ( !this.options.disableTouch ) {
                utils.addEvent(window, 'touchmove', this);
            }
            if ( !this.options.disablePointer ) {
                utils.addEvent(window, utils.prefixPointerEvent('pointermove'), this);
            }
            if ( !this.options.disableMouse ) {
                utils.addEvent(window, 'mousemove', this);
            }
    
            this.scroller._execEvent('beforeScrollStart');
        },
    
        _move: function (e) {
            var point = e.touches ? e.touches[0] : e,
                deltaX, deltaY,
                newX, newY,
                timestamp = utils.getTime();
    
            if ( !this.moved ) {
                this.scroller._execEvent('scrollStart');
            }
    
            this.moved = true;
    
            deltaX = point.pageX - this.lastPointX;
            this.lastPointX = point.pageX;
    
            deltaY = point.pageY - this.lastPointY;
            this.lastPointY = point.pageY;
    
            newX = this.x + deltaX;
            newY = this.y + deltaY;
    
            this._pos(newX, newY);
    
    // INSERT POINT: indicator._move
    
            e.preventDefault();
            e.stopPropagation();
        },
    
        _end: function (e) {
            if ( !this.initiated ) {
                return;
            }
    
            this.initiated = false;
    
            e.preventDefault();
            e.stopPropagation();
    
            utils.removeEvent(window, 'touchmove', this);
            utils.removeEvent(window, utils.prefixPointerEvent('pointermove'), this);
            utils.removeEvent(window, 'mousemove', this);
    
            if ( this.scroller.options.snap ) {
                var snap = this.scroller._nearestSnap(this.scroller.x, this.scroller.y);
    
                var time = this.options.snapSpeed || Math.max(
                        Math.max(
                            Math.min(Math.abs(this.scroller.x - snap.x), 1000),
                            Math.min(Math.abs(this.scroller.y - snap.y), 1000)
                        ), 300);
    
                if ( this.scroller.x != snap.x || this.scroller.y != snap.y ) {
                    this.scroller.directionX = 0;
                    this.scroller.directionY = 0;
                    this.scroller.currentPage = snap;
                    this.scroller.scrollTo(snap.x, snap.y, time, this.scroller.options.bounceEasing);
                }
            }
    
            if ( this.moved ) {
                this.scroller._execEvent('scrollEnd');
            }
        },
    
        transitionTime: function (time) {
            time = time || 0;
            var durationProp = utils.style.transitionDuration;
            if(!durationProp) {
                return;
            }
    
            this.indicatorStyle[durationProp] = time + 'ms';
    
            if ( !time && utils.isBadAndroid ) {
                this.indicatorStyle[durationProp] = '0.0001ms';
                // remove 0.0001ms
                var self = this;
                rAF(function() {
                    if(self.indicatorStyle[durationProp] === '0.0001ms') {
                        self.indicatorStyle[durationProp] = '0s';
                    }
                });
            }
        },
    
        transitionTimingFunction: function (easing) {
            this.indicatorStyle[utils.style.transitionTimingFunction] = easing;
        },
    
        refresh: function () {
            this.transitionTime();
    
            if ( this.options.listenX && !this.options.listenY ) {
                this.indicatorStyle.display = this.scroller.hasHorizontalScroll ? 'block' : 'none';
            } else if ( this.options.listenY && !this.options.listenX ) {
                this.indicatorStyle.display = this.scroller.hasVerticalScroll ? 'block' : 'none';
            } else {
                this.indicatorStyle.display = this.scroller.hasHorizontalScroll || this.scroller.hasVerticalScroll ? 'block' : 'none';
            }
    
            if ( this.scroller.hasHorizontalScroll && this.scroller.hasVerticalScroll ) {
                utils.addClass(this.wrapper, 'iScrollBothScrollbars');
                utils.removeClass(this.wrapper, 'iScrollLoneScrollbar');
    
                if ( this.options.defaultScrollbars && this.options.customStyle ) {
                    if ( this.options.listenX ) {
                        this.wrapper.style.right = '8px';
                    } else {
                        this.wrapper.style.bottom = '8px';
                    }
                }
            } else {
                utils.removeClass(this.wrapper, 'iScrollBothScrollbars');
                utils.addClass(this.wrapper, 'iScrollLoneScrollbar');
    
                if ( this.options.defaultScrollbars && this.options.customStyle ) {
                    if ( this.options.listenX ) {
                        this.wrapper.style.right = '2px';
                    } else {
                        this.wrapper.style.bottom = '2px';
                    }
                }
            }
    
            utils.getRect(this.wrapper);	// force refresh
    
            if ( this.options.listenX ) {
                this.wrapperWidth = this.wrapper.clientWidth;
                if ( this.options.resize ) {
                    this.indicatorWidth = Math.max(Math.round(this.wrapperWidth * this.wrapperWidth / (this.scroller.scrollerWidth || this.wrapperWidth || 1)), 8);
                    this.indicatorStyle.width = this.indicatorWidth + 'px';
                } else {
                    this.indicatorWidth = this.indicator.clientWidth;
                }
    
                this.maxPosX = this.wrapperWidth - this.indicatorWidth;
    
                if ( this.options.shrink == 'clip' ) {
                    this.minBoundaryX = -this.indicatorWidth + 8;
                    this.maxBoundaryX = this.wrapperWidth - 8;
                } else {
                    this.minBoundaryX = 0;
                    this.maxBoundaryX = this.maxPosX;
                }
    
                this.sizeRatioX = this.options.speedRatioX || (this.scroller.maxScrollX && (this.maxPosX / this.scroller.maxScrollX));
            }
    
            if ( this.options.listenY ) {
                this.wrapperHeight = this.wrapper.clientHeight;
                if ( this.options.resize ) {
                    this.indicatorHeight = Math.max(Math.round(this.wrapperHeight * this.wrapperHeight / (this.scroller.scrollerHeight || this.wrapperHeight || 1)), 8);
                    this.indicatorStyle.height = this.indicatorHeight + 'px';
                } else {
                    this.indicatorHeight = this.indicator.clientHeight;
                }
    
                this.maxPosY = this.wrapperHeight - this.indicatorHeight;
    
                if ( this.options.shrink == 'clip' ) {
                    this.minBoundaryY = -this.indicatorHeight + 8;
                    this.maxBoundaryY = this.wrapperHeight - 8;
                } else {
                    this.minBoundaryY = 0;
                    this.maxBoundaryY = this.maxPosY;
                }
    
                this.maxPosY = this.wrapperHeight - this.indicatorHeight;
                this.sizeRatioY = this.options.speedRatioY || (this.scroller.maxScrollY && (this.maxPosY / this.scroller.maxScrollY));
            }
    
            this.updatePosition();
        },
    
        updatePosition: function () {
            var x = this.options.listenX && Math.round(this.sizeRatioX * this.scroller.x) || 0,
                y = this.options.listenY && Math.round(this.sizeRatioY * this.scroller.y) || 0;
    
            if ( !this.options.ignoreBoundaries ) {
                if ( x < this.minBoundaryX ) {
                    if ( this.options.shrink == 'scale' ) {
                        this.width = Math.max(this.indicatorWidth + x, 8);
                        this.indicatorStyle.width = this.width + 'px';
                    }
                    x = this.minBoundaryX;
                } else if ( x > this.maxBoundaryX ) {
                    if ( this.options.shrink == 'scale' ) {
                        this.width = Math.max(this.indicatorWidth - (x - this.maxPosX), 8);
                        this.indicatorStyle.width = this.width + 'px';
                        x = this.maxPosX + this.indicatorWidth - this.width;
                    } else {
                        x = this.maxBoundaryX;
                    }
                } else if ( this.options.shrink == 'scale' && this.width != this.indicatorWidth ) {
                    this.width = this.indicatorWidth;
                    this.indicatorStyle.width = this.width + 'px';
                }
    
                if ( y < this.minBoundaryY ) {
                    if ( this.options.shrink == 'scale' ) {
                        this.height = Math.max(this.indicatorHeight + y * 3, 8);
                        this.indicatorStyle.height = this.height + 'px';
                    }
                    y = this.minBoundaryY;
                } else if ( y > this.maxBoundaryY ) {
                    if ( this.options.shrink == 'scale' ) {
                        this.height = Math.max(this.indicatorHeight - (y - this.maxPosY) * 3, 8);
                        this.indicatorStyle.height = this.height + 'px';
                        y = this.maxPosY + this.indicatorHeight - this.height;
                    } else {
                        y = this.maxBoundaryY;
                    }
                } else if ( this.options.shrink == 'scale' && this.height != this.indicatorHeight ) {
                    this.height = this.indicatorHeight;
                    this.indicatorStyle.height = this.height + 'px';
                }
            }
    
            this.x = x;
            this.y = y;
    
            if ( this.scroller.options.useTransform ) {
                this.indicatorStyle[utils.style.transform] = 'translate(' + x + 'px,' + y + 'px)' + this.scroller.translateZ;
            } else {
                this.indicatorStyle.left = x + 'px';
                this.indicatorStyle.top = y + 'px';
            }
        },
    
        _pos: function (x, y) {
            if ( x < 0 ) {
                x = 0;
            } else if ( x > this.maxPosX ) {
                x = this.maxPosX;
            }
    
            if ( y < 0 ) {
                y = 0;
            } else if ( y > this.maxPosY ) {
                y = this.maxPosY;
            }
    
            x = this.options.listenX ? Math.round(x / this.sizeRatioX) : this.scroller.x;
            y = this.options.listenY ? Math.round(y / this.sizeRatioY) : this.scroller.y;
    
            this.scroller.scrollTo(x, y);
        },
    
        fade: function (val, hold) {
            if ( hold && !this.visible ) {
                return;
            }
    
            clearTimeout(this.fadeTimeout);
            this.fadeTimeout = null;
    
            var time = val ? 250 : 500,
                delay = val ? 0 : 300;
    
            val = val ? '1' : '0';
    
            this.wrapperStyle[utils.style.transitionDuration] = time + 'ms';
    
            this.fadeTimeout = setTimeout((function (val) {
                this.wrapperStyle.opacity = val;
                this.visible = +val;
            }).bind(this, val), delay);
        }
    };
    
    IScroll.utils = utils;
    
    if ( typeof module != 'undefined' && module.exports ) {
        module.exports = IScroll;
    } else if ( typeof define == 'function' && define.amd ) {
            define( function () { return IScroll; } );
    } else {
        window.IScroll = IScroll;
    }
    
    })(window, document, Math);